Preparation method of toughened polypropylene resin

A polypropylene resin and polypropylene technology, which is applied in the field of preparation of toughened polypropylene resin, can solve problems such as limited application, and achieve the effects of simple process operation and controllable polymer performance indicators.

Inactive Publication Date: 2020-01-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to solve the problems of the prior art and to meet the requirements of the thermoformed product enterprises on the toughness of raw materials, the present invention proposes a method for preparing toughened polypropylene resin, which aims to improve the impact strength of polypropylene resin and solve the problem of polypropylene raw materials in The problem of limited application at low temperature, especially in winter and in refrigerators, further broadens the application range and field of polypropylene resin

Method used

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  • Preparation method of toughened polypropylene resin
  • Preparation method of toughened polypropylene resin
  • Preparation method of toughened polypropylene resin

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1. With liquid propylene of purity 99.6% as main raw material, adopt NDQ catalyst (catalyst activity 19Kg polypropylene / g catalyst), add the ethylene of purity 99.96% of propylene mass percent 0.8%, on Spheripol process single-loop polypropylene device, Produced random copolymerized polypropylene base resin;

[0026] 2. Add 5 parts of melt flow rate of 0.8g / 10min and density of 0.915g / cm to 95 parts of random copolymerized polypropylene extrusion resin 3Ultra-low-density polyethylene resin, and add additives, including 0.05 parts of antioxidant 1010, 0.1 part of antioxidant 168, 0.05 parts of calcium stearate, 0.05 parts of monoglyceride stearate, HPN-20E It is 0.025 parts. After fully mixing, it is extruded through a twin-screw extruder. The temperatures of the extruder from feeding to the head are: 190°C, 192°C, 195°C, 200°C, 205°C, 205°C, 200°C , 195°C, 190°C, 185°C, pelletized to obtain toughened polypropylene resin. The performance test is carried out according t...

Embodiment 2

[0028] 1. With liquid propylene of purity 99.7% as main raw material, adopt NDQ catalyst (catalyst activity 20Kg polypropylene / g catalyst), add the ethylene of purity 99.95% of propylene mass percent 0.8%, on Spheripol process single-loop polypropylene device, Produced random copolymerized polypropylene base resin;

[0029] 2. Add 10 parts of melt flow rate 0.9g / 10min and density 0.913g / cm to 90 parts of random copolymerized polypropylene base resin 3 Ultra-low-density polyethylene resin, and add additives, including 0.05 parts of antioxidant 1010, 0.1 part of antioxidant 168, 0.05 parts of calcium stearate, 0.05 parts of monoglyceride stearate, HPN-20E It is 0.025 parts. After fully mixing, it is extruded through a twin-screw extruder. The temperatures of the extruder from feeding to the head are: 192°C, 192°C, 196°C, 203°C, 206°C, 208°C, 201°C , 195°C, 191°C, 186°C, and granulate to obtain the toughened polypropylene resin of the present invention. The performance test is ...

Embodiment 3

[0031] 1. With liquid propylene of purity 99.8% as main raw material, adopt NDQ catalyst (catalyst activity 21Kg polypropylene / g catalyst), add the ethylene of the purity 99.97% of propylene mass percent 0.8%, on Spheripol process single-loop polypropylene device, Produced random copolymerized polypropylene base resin;

[0032] 2. Add 15 parts of melt flow rate 1.0g / 10min and density 0.914g / cm to 85 parts of random copolymerized polypropylene base resin 3 Ultra-low-density polyethylene resin, and add additives, including 0.05 parts of antioxidant 1010, 0.1 part of antioxidant 168, 0.05 parts of calcium stearate, 0.05 parts of monoglyceride stearate, HPN-20E It is 0.025 parts. After fully mixing, it is extruded through a twin-screw extruder. The temperatures of the extruder from feeding to the head are: 196°C, 197°C, 198°C, 203°C, 209°C, 209°C, 202°C , 198°C, 193°C, 188°C, and granulate to obtain the toughened polypropylene resin of the present invention. The performance test...

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Abstract

The invention discloses a preparation method of toughened polypropylene resin. Liquid propylene is used as a main raw material, NDQ catalyst is adopted, ethylene with propylene mass percentage of 0.8-1.4% is added, and random copolymerized polypropylene base resin with molecular weight distribution Mw / Mn of 5.0-7.5 is produced on a Spheripol process single loop polypropylene device. By adding ultra-low density polyethylene resin with the total mass fraction of 5-15% into the random copolymerized polypropylene base resin, adding additive systems such as antioxidant and the like, fully mixing, extruding and granulating by a double-screw extruder, the toughened polypropylene product is obtained. The toughened polypropylene has good anti-sagging performance and toughness, especially the notchimpact strength of a normal-temperature simply supported beam can be obviously improved by more than 30% compared with that of common polypropylene, and the toughened polypropylene resin is suitable for sheet extrusion, and is used for processing and producing trays, meal covers, food packaging containers, folding boxes, stationery supplies, industrial parts and other packaging for plastic absorption molding.

Description

technical field [0001] The invention discloses a preparation method of toughened polypropylene resin. The polypropylene resin produced by this method has the characteristics of good sag resistance and good toughness, especially the notched impact strength of the normal temperature Charpy beam can be significantly increased by more than 30.0% compared with ordinary polypropylene, and is suitable for sheet extrusion. Processing and production of trays for plastic forming, meal lids, food packaging containers and folding boxes, stationery, industrial parts, etc. Background technique [0002] Polypropylene is one of the most promising thermoplastic polymer materials today. Compared with other general-purpose thermoplastics, it has low density, non-toxicity, easy processing, good yield strength, surface strength and other mechanical properties, and has outstanding properties. Stress cracking resistance, abrasion resistance and chemical stability, as well as wide source of raw ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/06C08K5/00C08K5/098C08K5/103B29B9/06B29B9/12
CPCB29B9/06B29B9/12C08K2201/014C08L23/14C08L2207/068C08L23/06C08K5/00C08K5/098C08K5/103
Inventor 曹建秋马国玉王辉
Owner CHINA PETROLEUM & CHEM CORP
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